20927982 has 8 divisors (see below), whose sum is σ = 41855976. Its totient is φ = 6975992.

The previous prime is 20927981. The next prime is 20927993. The reversal of 20927982 is 28972902.

It is a sphenic number, since it is the product of 3 distinct primes.

20927982 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 20927982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20927981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1743993 + ... + 1744004.

It is an arithmetic number, because the mean of its divisors is an integer number (5231997).

Almost surely, 2^20927982 is an apocalyptic number.

20927982 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20927982 is a wasteful number, since it uses less digits than its factorization.

20927982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3488002.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 20927982 is about 4574.7111384217. The cubic root of 20927982 is about 275.5766719736.

The spelling of 20927982 in words is "twenty million, nine hundred twenty-seven thousand, nine hundred eighty-two".